JPH084620Y2 - Rotation sensor - Google Patents
Rotation sensorInfo
- Publication number
- JPH084620Y2 JPH084620Y2 JP1990062559U JP6255990U JPH084620Y2 JP H084620 Y2 JPH084620 Y2 JP H084620Y2 JP 1990062559 U JP1990062559 U JP 1990062559U JP 6255990 U JP6255990 U JP 6255990U JP H084620 Y2 JPH084620 Y2 JP H084620Y2
- Authority
- JP
- Japan
- Prior art keywords
- conversion element
- magnetoelectric conversion
- permanent magnet
- sensor
- magnetism collecting
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は回転センサに係り、特に磁電変換素子と永久
磁石との間の磁束の漏洩を低減させた回転センサに関す
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a rotation sensor, and more particularly to a rotation sensor in which leakage of magnetic flux between a magnetoelectric conversion element and a permanent magnet is reduced.
〔従来の技術〕 一般に、被測定物の回転速度を検出する回転センサは
知られている。この種のものは、第２図に示すように、
被測定物（図示せず）に連結された回転軸１の軸上に、
磁性体の歯車３を止着し、この磁性体の歯車３の歯面3a
に対向してセンサ本体５を配置して構成されている。こ
のセンサ本体５は、磁電変換素子７と永久磁石９とを隣
接配置して構成されている。[Prior Art] Generally, a rotation sensor for detecting the rotation speed of an object to be measured is known. This kind of thing, as shown in FIG.
On the axis of the rotary shaft 1 connected to the object to be measured (not shown),
The gear 3 made of a magnetic material is fixed, and the tooth surface 3a of the gear 3 made of a magnetic material is fixed.
The sensor body 5 is arranged so as to be opposed to. The sensor body 5 is configured by arranging a magnetoelectric conversion element 7 and a permanent magnet 9 adjacent to each other.
ところで、通常、磁電変換素子７の出力は微弱であ
り、この出力は増幅して使用されるが、SN比を向上させ
るためには、歯車３と磁電変換素子７とのギャップ11を
小さくするか、または永久磁石９の磁束密度を大きくす
る必要がある。By the way, normally, the output of the magnetoelectric conversion element 7 is weak, and this output is amplified and used. However, in order to improve the SN ratio, is it necessary to reduce the gap 11 between the gear 3 and the magnetoelectric conversion element 7. , Or the magnetic flux density of the permanent magnet 9 must be increased.
しかし、ギャップ11を小さくするよう管理するとコス
トが高くなる。また、永久磁石９の磁束密度を大きくす
るには、永久磁石９自体を大きくすればよいが、これを
大きくすると、磁電変換素子７を含むセンサ本体５自体
が大きくなり、狭隘な部位での該センサの使用が不可能
になる。However, managing the gap 11 to be small increases the cost. Further, in order to increase the magnetic flux density of the permanent magnet 9, it is sufficient to increase the size of the permanent magnet 9 itself. The sensor cannot be used.
これを解消するため、永久磁石９を磁電変換素子７か
ら離間するとともに、両者間に、集磁材（図示せず）を
介装し、磁電変換素子７はそのまゝの大きさにし、磁束
密度を大きくするため永久磁石９だけを大きくして、狭
隘な部位でのセンサの使用を可能にした回転センサが提
案されている。In order to solve this, the permanent magnet 9 is separated from the magnetoelectric conversion element 7, and a magnetism collecting material (not shown) is interposed between the permanent magnet 9 and the magnetoelectric conversion element 7 so that the magnetism conversion element 7 has its size. There has been proposed a rotation sensor in which only the permanent magnets 9 are made large in order to increase the density, so that the sensor can be used in a narrow space.
（例えば、実開昭63−19214号公報）。(For example, Japanese Utility Model Laid-Open No. 63-19214).
しかしながら、従来の構成では、磁電変換素子７と永
久磁石９との間に介装した集磁材（図示せず）から磁束
が漏洩して、センサの出力が低下すると云う問題があ
る。However, in the conventional configuration, there is a problem that the magnetic flux leaks from a magnetism collecting material (not shown) interposed between the magnetoelectric conversion element 7 and the permanent magnet 9 and the output of the sensor is reduced.
そこで、本考案の目的は、上述した従来の技術が有す
る問題点を解消し、磁電変換素子と永久磁石との間の磁
束の漏洩を低減させた回転センサを提供することにあ
る。Therefore, an object of the present invention is to solve the above-mentioned problems of the conventional technique and to provide a rotation sensor in which leakage of magnetic flux between a magnetoelectric conversion element and a permanent magnet is reduced.
上記目的を達成するために、本考案は、被測定物に連
結された磁性体からなる回転歯車の歯面に対向してセン
サ本体を配置し、このセンサ本体を、磁電変換素子と永
久磁石とにより構成してなるものにおいて、磁電変換素
子と永久磁石との間に磁性体からなる棒状の集磁材を介
装するとともに、この集磁材の断面積を、磁電変換素子
の外形の断面積よりも小さくしたことを特徴とするもの
である。In order to achieve the above object, the present invention arranges a sensor body so as to face a tooth surface of a rotating gear made of a magnetic material and connected to an object to be measured. In this configuration, a rod-shaped magnetism collecting material made of a magnetic material is interposed between the magnetoelectric conversion element and the permanent magnet, and the cross-sectional area of the magnetism converting material is the cross-sectional area of the outer shape of the magnetoelectric conversion element. It is characterized in that it is smaller than.
本考案によれば、永久磁石から発生する磁束のほとん
どが棒状の集磁材に集められ、集磁材、磁電変換素子の
経路で通過し、回転歯車の歯面に至る。According to the present invention, most of the magnetic flux generated from the permanent magnet is collected in the rod-shaped magnetism collecting material, passes through the path of the magnetism collecting material and the magnetoelectric conversion element, and reaches the tooth surface of the rotary gear.
このとき、永久磁石と磁電変換素子との間に集磁材を
介在させたので、磁電変換素子を回転歯車の歯面に接近
させることができ、すなわち磁電変換素子と回転歯車の
歯車面とのギャップを狭め、センサ出力を増大すること
ができる。At this time, since the magnetism collecting material is interposed between the permanent magnet and the magnetoelectric conversion element, the magnetoelectric conversion element can be brought close to the tooth surface of the rotary gear, that is, the magnetoelectric conversion element and the gear surface of the rotary gear. The gap can be narrowed and the sensor output can be increased.
また、集磁材の断面積を磁電変換素子の外形の断面積
よりも小さくしたことにより、集磁材を介して供給され
る磁束のすべてを磁電変換素子に与えることができるの
で、センサ出力を増大することができる。Further, by making the cross-sectional area of the magnetism collecting material smaller than the cross-sectional area of the outer shape of the magnetoelectric conversion element, all the magnetic flux supplied via the magnetism collecting material can be given to the magnetoelectric conversion element, so that the sensor output is Can be increased.
さらに、集磁材を棒状にしたので、加工および組み立
て等が容易であり、製造手間が減らすことができる。Further, since the magnetism collecting material is formed in a rod shape, it can be easily processed and assembled, and the manufacturing labor can be reduced.
以下、本考案による回転センサの一実施例を第２図と
同一部分に同一符号を付して示した第１図を参照して説
明する。An embodiment of the rotation sensor according to the present invention will be described below with reference to FIG. 1 in which the same parts as those in FIG.
第１図において、１は被測定物（図示せず）に連結さ
れた回転軸を示している。この回転軸１の軸上には、磁
性体の歯車３が止着されており、この歯車３の外側に
は、該歯車３の歯面3aに対向するセンサ本体５が配置さ
れている。In FIG. 1, reference numeral 1 denotes a rotary shaft connected to an object to be measured (not shown). A magnetic gear 3 is fixed on the rotation shaft 1, and a sensor main body 5 facing the tooth surface 3 a of the gear 3 is arranged outside the gear 3.
このセンサ本体５は、磁電変換素子７と永久磁石９と
を有しており、両者間は、非磁性体の基板13により連結
されている。また、この基板13には、磁電変換素子７と
永久磁石９との間の高透磁率を保有する集磁材15が埋設
されており、この集磁材15の外形の断面積は、磁電変換
素子７の外形の断面図よりも小さく形成されている。The sensor body 5 has a magnetoelectric conversion element 7 and a permanent magnet 9, and the two are connected by a non-magnetic substrate 13. Further, a magnetism collecting material 15 having a high magnetic permeability between the magnetoelectric conversion element 7 and the permanent magnet 9 is embedded in the substrate 13, and the cross-sectional area of the outer shape of the magnetism converting material 15 is It is formed smaller than the cross-sectional view of the outer shape of the element 7.
次に、この実施例の作用を説明する。被測定物（図示
せず）の回転に伴って、磁性体の歯車３が回転すると、
歯車３の外周の凹凸に応じて、該歯車３と永久磁石９と
の間を通る磁束密度に変化が生じる。よって、被測定物
（図示せず）の回転速度を算出するには、この磁束密度
の変化を、磁電変換素子７により検出し、この検出値に
基づいて回転速度を算出する。Next, the operation of this embodiment will be described. When the gear 3 of the magnetic body rotates along with the rotation of the DUT (not shown),
The magnetic flux density passing between the gear 3 and the permanent magnet 9 changes according to the unevenness of the outer periphery of the gear 3. Therefore, in order to calculate the rotation speed of the object to be measured (not shown), the change in the magnetic flux density is detected by the magnetoelectric conversion element 7, and the rotation speed is calculated based on the detected value.
しかして、この実施例によれば、永久磁石９を磁電変
換素子７から離間し、磁電変換素子７と永久磁石９との
間に、高透磁率を有する集磁材15を埋設したので、磁電
変換素子７は従来のまゝの大きさにし、磁束密度を大き
くするために永久磁石９だけを大きくすることができる
ので、狭隘な部位でのセンサの使用が可能になる。Thus, according to this embodiment, the permanent magnet 9 is separated from the magnetoelectric conversion element 7, and the magnetism collecting material 15 having a high magnetic permeability is embedded between the magnetoelectric conversion element 7 and the permanent magnet 9. Since the conversion element 7 has a conventional size and only the permanent magnet 9 can be increased in order to increase the magnetic flux density, the sensor can be used in a narrow space.
また、これによれば、永久磁石９を磁電変換素子７か
ら離間しても、集磁材15の透磁率が高いので、センサの
出力が低下することはない。Further, according to this, even when the permanent magnet 9 is separated from the magnetoelectric conversion element 7, the magnetic permeability of the magnetism collecting material 15 is high, so that the output of the sensor does not decrease.
さらに、例えば、集磁材15の断面積が、磁電変換素子
７の外形の断面積よりも大きく形成されている場合に
は、集磁材15に集まる磁束のうちの一部の磁束だけが、
磁電変換素子７を通り、それ以外の磁束は、磁電変換素
子７を通らずに漏洩するので、センサの出力は低下す
る。Furthermore, for example, when the cross-sectional area of the magnetism collecting material 15 is formed to be larger than the cross-sectional area of the outer shape of the magnetoelectric conversion element 7, only a part of the magnetic fluxes collected in the magnetism collecting material 15 is
Since the magnetic flux that passes through the magnetoelectric conversion element 7 and the other magnetic flux leaks without passing through the magnetoelectric conversion element 7, the output of the sensor decreases.
しかして、この実施例によれば、集磁材15の外形の断
面積は、磁電変換素子７の外形の断面積よりも小さく形
成されているので、この集磁材15に集まる磁束は全て磁
電変換素子７を通るので、磁束の漏れを低減させること
ができる。Therefore, according to this embodiment, since the cross-sectional area of the outer shape of the magnetism collecting material 15 is formed smaller than the cross-sectional area of the outer shape of the magnetoelectric conversion element 7, all the magnetic flux collected in the magnetism collecting material 15 is the magnetoelectric material. Since it passes through the conversion element 7, leakage of magnetic flux can be reduced.
本考案によれば、永久磁石と磁電変換素子との間に棒
状の集磁材を介在させて、永久磁石から発生する磁束の
ほとんどを集磁材に集め、集磁材、磁電変換素子の経路
で磁束を通過させて回転歯車の歯面に至るように構成し
たので、磁電変換素子を回転歯車の歯面に接近させて磁
電変換素子と回転歯車の歯面とのキャップを狭め、集磁
材の断面積を磁電変換素子の外形の断面積よりも小さく
したことにより、集磁材を介して供給される磁束のすべ
てを磁電変換素子に与えることができるので、センサ出
力を増大することができる。さらに、集磁材を棒状にし
たので、加工および組み立て等が容易であり、製造手間
を減らすことができる。According to the present invention, by interposing a rod-shaped magnetism collecting material between the permanent magnet and the magnetoelectric conversion element, most of the magnetic flux generated from the permanent magnet is collected in the magnetism collecting material, and the path of the magnetism collecting material and the magnetoelectric conversion element is collected. Since the magnetic flux is passed through to reach the tooth surface of the rotating gear, the magnetoelectric conversion element is brought closer to the tooth surface of the rotating gear to narrow the cap between the electromagnetic conversion element and the tooth surface of the rotating gear, and By making the cross-sectional area of the magnetic field smaller than the cross-sectional area of the outer shape of the magnetoelectric conversion element, all of the magnetic flux supplied through the magnetism collecting material can be given to the magnetoelectric conversion element, so that the sensor output can be increased. . Further, since the magnetism collecting material is formed in a rod shape, it can be easily processed and assembled, and the manufacturing labor can be reduced.
第１図は本考案による回転センサの一実施例を示す平面
図、第２図は従来の回転センサを示す平面図である。 １…回転軸、３…歯車、3a…歯面、５…センサ本体、７
…磁電変換素子、９…永久磁石、13…基板、15…集磁
材。FIG. 1 is a plan view showing an embodiment of a rotation sensor according to the present invention, and FIG. 2 is a plan view showing a conventional rotation sensor. 1 ... Rotary shaft, 3 ... Gear, 3a ... Tooth surface, 5 ... Sensor body, 7
... Magnetoelectric conversion element, 9 ... Permanent magnet, 13 ... Substrate, 15 ... Magnetic flux collector.
Claims (1)
歯車の歯面に対してセンサ本体を配置し、このセンサ本
体を、磁電変換素子と永久磁石とにより構成してなる回
転センサにおいて、 磁電変換素子と永久磁石との間に、磁性体からなる棒状
の集磁材を介装するとともに、この集磁材の断面積を前
記磁電変換素子の外形の断面積よりも小さくしたことを
特徴とする回転センサ。1. A rotation sensor in which a sensor body is arranged on a tooth surface of a rotating gear made of a magnetic material and connected to an object to be measured, and the sensor body is composed of a magnetoelectric conversion element and a permanent magnet. , A rod-shaped magnetism collecting material made of a magnetic material is interposed between the magnetoelectric conversion element and the permanent magnet, and the cross sectional area of the magnetism converting material is made smaller than the cross sectional area of the outer shape of the magnetoelectric conversion element. A characteristic rotation sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990062559U JPH084620Y2 (en) | 1990-06-13 | 1990-06-13 | Rotation sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990062559U JPH084620Y2 (en) | 1990-06-13 | 1990-06-13 | Rotation sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0421965U JPH0421965U (en) | 1992-02-24 |
| JPH084620Y2 true JPH084620Y2 (en) | 1996-02-07 |
Family
ID=31591822
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990062559U Expired - Lifetime JPH084620Y2 (en) | 1990-06-13 | 1990-06-13 | Rotation sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH084620Y2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6566885B2 (en) * | 2016-02-10 | 2019-08-28 | メレキシス テクノロジーズ エス エー | Rotation detector |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6090675U (en) * | 1983-11-26 | 1985-06-21 | 株式会社ボッシュオートモーティブ システム | Compressor rotation speed detection device |
| JP3046865U (en) * | 1996-05-01 | 1998-03-24 | 株式会社クボタ | Vending machine push button switch device |
-
1990
- 1990-06-13 JP JP1990062559U patent/JPH084620Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0421965U (en) | 1992-02-24 |
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